Software · head to head
Ubuntu vs Keycloak
Ubuntu
Software
Enterprise Linux distribution with 15-year support options.
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Ubuntu free version supported only by community; no official Canonical support without Pro subscription; Keycloak requires self-hosted deployment and operational expertise to install, configure and maintain
Where they differ
Only the attributes on which Ubuntu and Keycloak actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).
What people use each for
The jobs each tool is most often brought in to do.
Ubuntu
- Individual developers and small teams using free Ubuntu for laptops and serversnot Keycloak
- Cloud and data centre deployments requiring certified, supported Linux operating systemnot Keycloak
- Organisations needing FIPS-certified or DISA-STIG-hardened Linux for government and regulated environmentsnot Keycloak
- AI and machine learning teams using Ubuntu Desktop with pre-optimised toolchainsnot Keycloak
- IoT and edge computing deployments using Ubuntu Corenot Keycloak
Keycloak
- Organisations requiring self-hosted identity infrastructure for compliance or data residencynot Ubuntu
- Companies with existing LDAP/Active Directory systems needing federated authenticationnot Ubuntu
- Open-source projects and communities requiring free IAM without licensing costsnot Ubuntu
- Enterprises building custom identity workflows requiring fine-grained authorisationnot Ubuntu
- Teams with sufficient operational expertise to manage infrastructurenot Ubuntu
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Ubuntu
- Free version supported only by community; no official Canonical support without Pro subscription
- Ubuntu Pro required for enterprise compliance certifications (FIPS, DISA-STIG); free version does not include these
- Ubuntu Pro pricing is proprietary and varies based on cloud deployment (AWS, Azure, GCP); no published per-machine or per-user pricing
- Ubuntu Pro + Support adds 24/7 support costs on top of base subscription; total cost for enterprise-grade support not transparent
- Personal/free tier limited to 5 machines; any larger deployment requires paid enterprise subscription
Keycloak
- Requires self-hosted deployment and operational expertise to install, configure and maintain
- No managed cloud option provided by Red Hat; organisations must operate infrastructure themselves or use third-party distributions
- Clustering and high-availability configurations require additional operational knowledge
- Community support only; commercial support requires third-party vendors or distributions
Pricing, plan by plan
Ubuntu
Free- Ubuntu (Free)Free
- Desktop, Server, Core and Cloud editions
- Community support
- Standard security updates (5 years LTS)
- Ubuntu Pro (Personal)Free
- Extended Security Maintenance (10 years)
- Kernel Livepatch
- Landscape management
- Ubuntu Pro (Enterprise)$null/variable
- 10 years Extended Security Maintenance
- FIPS 140, DISA-STIG, CIS compliance
- Kernel Livepatch
- Ubuntu Pro + Support$null/variable
- All Ubuntu Pro features
- 24/7 break-fix and bug-fix support
- Expert assistance for infrastructure and applications
Keycloak
Free- Open-sourceFree
- Full platform functionality
- Self-hosted deployment
- Community support
Which should you pick?
Choose Ubuntu if
- You want to start without paying.
- You work on Desktop, Server, Cloud, IoT, Edge, WSL.
Choose Keycloak if
- You want to start without paying.
- You work on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
Questions people ask
- Is Ubuntu or Keycloak better?
- Neither clearly leads. Ubuntu starts at Free and Keycloak at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Ubuntu or Keycloak?
- Ubuntu starts at Free and Keycloak at Free.
- Does Ubuntu or Keycloak run on more platforms?
- Ubuntu runs on Desktop, Server, Cloud, IoT, Edge, WSL. Keycloak runs on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
- Can I use Ubuntu for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Ubuntu best used for?
- Ubuntu is most often used for individual developers and small teams using free ubuntu for laptops and servers, cloud and data centre deployments requiring certified, supported linux operating system, organisations needing fips-certified or disa-stig-hardened linux for government and regulated environments, ai and machine learning teams using ubuntu desktop with pre-optimised toolchains. Of those, individual developers and small teams using free ubuntu for laptops and servers and cloud and data centre deployments requiring certified, supported linux operating system are not what Keycloak is typically brought in for.
Answered from the vendors’ own pages
Ubuntu: Is Ubuntu free?
Yes. Ubuntu is free to download and use in all editions. Community support is also available at no cost. Ubuntu Pro subscriptions are optional and provide extended support and compliance tools.
SourceKeycloak: What protocols does Keycloak support?
Keycloak supports OpenID Connect, OAuth 2.0 and SAML 2.0 protocols for authentication and authorisation.
SourceUbuntu: How long is Ubuntu LTS support?
Standard Ubuntu LTS releases receive 5 years of security maintenance. Ubuntu Pro extends this to 10 years, expandable to 15 years with the Legacy add-on.
SourceKeycloak: Can Keycloak integrate with existing user directories?
Yes. Keycloak supports user federation with LDAP and Active Directory systems, allowing organisations to leverage existing user directories.
SourceUbuntu: What compliance certifications does Ubuntu Pro provide?
Ubuntu Pro provides compliance tools for FIPS 140, DISA-STIG, CIS, FedRAMP and PCI-DSS standards.
SourceKeycloak: Is Keycloak free?
Yes. Keycloak is fully open-source and free to deploy and use. No licensing fees are required.
Source